I was given this puzzle a few days back and spent quite some time trying to solve it.
So here it goes 16 pawns are given (representing soldiers), the idea is that each diagonal, horizontal or vertical (representing the possible trajectories of incoming enemy fire) must contain no more than two pawns (to minimize the casualties). However the center is very important so 2 pawns must be placed in the central four suares (d4,e4,d5,e5). The 16 pawns in the final position must fulfill the condition.
Can you do it?